AODocs - AODocs is the document management solution recommended for G Suite. Secure your documents, structure your content, & automate your processes
Leap - With Leap you find things based on your natural memory of that file.
Docomotion - Docomotion offers tools for designing and generating all types of transactional and operational business documents.
DEVONthink - DEVONtechnologies develops DEVONthink, DEVONagent, and other Mac and iOS apps for document and information management and web research.
infoRouter - infoRouter is a EDMS that includes Workflow, Document routing, Electronic Forms, Scanning, Storage, Archiving, Indexing & Records Management
Elyse - The free version allows up to 30 tags.